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On the basis of mathematical model of elastic multilink manipulator the kinematics of spatial motion is investigated. Тhe case when both the links and connecting nodes between links of manipulator are elastic is considered. Introduced three groups of generalized coordinates that define the spatial positions of the characteristic points of the manipulator and the configuration during movement. Assuming that the generalized coordinates describing the elastic properties of the manipulator are small the kinematic relationships are defined in the framework of linear theory of elasticity. The formula (expressions) that оbtained in general case are used to investigate the kinematics of movment of two-link manipulator on a movable base. The manipulator has three degrees of freedom, the second link is inextensible elastic rod, and the connecting nodes contain the elastic elements. [ABSTRACT FROM AUTHOR]

Purpose. This article is devoted to the analyzes of the induction motor energy loss with different control algorithms. Methodology. The theory of electric drives and electric machines was used. Studies were conducted using mathematical modeling methods. Findings. The main result is a comparative analysis of the electromagnetic energy losses in the induction motor using control algorithms that provide a maximum "torque-current" ratio and magnetizing current stabilization. Originality. It was found that the use of control algorithms, providing increase of the "torque-current" ratio allows reducing energy loss. Practical Value. Used in the analysis approach allows a preliminary assessment of the energy efficiency of electric drive systems with induction motors. [ABSTRACT FROM AUTHOR]